The easiest way to import leads (from your Roddy's FLS lists) for skip tracing is at prophawk.com
Signup is free and you only have to pay for leads received (skip tracing/contact info, phone numbers, emails) and marketing messages (voicemails, etc) if you choose to send those through the system.
First, there is a quick overview video at https://www.prophawk.com/
Second, this video shows how to order Phone Numbers and Email Addresses. We are able to get phone numbers for about 70% of the listed properties and have about 85% percent accuracy on the numbers that we do obtain.
Third, this video shows how to send Voicemails and marketing campaigns: